Low Risk

opa_get_futures_curve

Get the full futures forward curve showing prices across all contract months. Use when the user asks about the forward curve, contango/backwardation, or term structure. Returns a table of contract months with prices and changes, plus market structure analysis.

Part of the Oilpriceapi server.

opa_get_futures_curve is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call opa_get_futures_curve to retrieve information from Oilpriceapi without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though opa_get_futures_curve only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "opa_get_futures_curve": {}
  }
}

See the full Oilpriceapi policy for all 14 tools.

Get this rule live on your own Oilpriceapi server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access opa_get_futures_curve gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so opa_get_futures_curve only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the opa_get_futures_curve tool do? +

Get the full futures forward curve showing prices across all contract months. Use when the user asks about the forward curve, contango/backwardation, or term structure. Returns a table of contract months with prices and changes, plus market structure analysis.. It is categorised as a Read tool in the Oilpriceapi MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on opa_get_futures_curve? +

Register the Oilpriceapi MCP server in PolicyLayer and add a rule for opa_get_futures_curve: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Oilpriceapi. Nothing to install.

What risk level is opa_get_futures_curve? +

opa_get_futures_curve is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit opa_get_futures_curve? +

Yes. Add a rate_limit block to the opa_get_futures_curve rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block opa_get_futures_curve completely? +

Set action: deny in the PolicyLayer policy for opa_get_futures_curve. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides opa_get_futures_curve? +

opa_get_futures_curve is provided by the Oilpriceapi MCP server (OilpriceAPI/oilpriceapi-api). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Oilpriceapi tool call.

Deterministic rules across all 14 Oilpriceapi tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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